Foam core for a cushion of a seat part or a reclining part or a back rest of a piece of upholstered furniture or a motor vehicle seat

Abstract

A foam core (12) for a cushion (8, 9) of a seat part (2) or a reclining part or a back rest (3) of a piece of upholstered furniture (1) or a motor vehicle seat (11) or for a mattress or support surface of a piece of reclining furniture, with a core base (13) of foam material, in particular of cold foam, visco foam, latex foam or molded foam, there being in the core base (13) a plurality of spring strips (14) which run preferably at least essentially parallel to one another. It is provided that at least one spring strip (14) has an in particular pultruded fiber core (20) which has preferably glass fibers, and a mantle (21) of a thermoplastic material, in particular of polypropylene, which surrounds the fiber core (20).

What is claimed is: 
     
       1. A foam core for a cushion of one of a seat part, a reclining part, a back rest, a mattress or other support surface, comprising:
 a core base of foam material containing a plurality of spring strips, 
 wherein at least one spring strip has a fiber core and a mantle of a thermoplastic material which surrounds the fiber core, and 
 wherein the spring strips have been foamed into the core base in a manner forming a layered structure in the form of foam-spring strips-foam, and 
 wherein the fiber core of the spring strip has a fiber core strand and a winding which at least in part helically surrounds the fiber core strand so that intermediate spaces are formed for interlocking with the thermoplastic material of the mantel. 
 
     
     
       2. The foam core as claimed in  claim 1 , wherein the spring strips extend at least one of between a front and back face of the core base; or essentially parallel to at least one of a top or bottom of the core base. 
     
     
       3. The foam core as claimed in  claim 1 , wherein a strip leg protrudes from the mantle on each of opposite sides thereof. 
     
     
       4. The foam core as claimed in  claim 3 , wherein the strip leg has a width that is greater than a diameter of the fiber core. 
     
     
       5. The foam core as claimed in  claim 3 , wherein a maximum thickness of the strip leg is smaller than the diameter of the fiber core. 
     
     
       6. The foam core as claimed in  claim 3 , wherein the spring strip is mirror-symmetrical around a central axis of at least one the strip leg or of the core running perpendicular to the central axis of the leg. 
     
     
       7. The foam core as claimed in  claim 1 , wherein the spring strips are embedded in a foam into the core base. 
     
     
       8. A foam core for a cushion of one of a seat part, a reclining part, a back rest, a mattress or other support surface, comprising:
 a core base of foam material containing a plurality of spring strips, 
 wherein at least one spring strip has a fiber core and a mantle of a thermoplastic material which surrounds the fiber core, and 
 wherein the spring strips have been foamed into the core base in a manner forming a layered structure in the form of foam-spring strips-foam, and 
 wherein each strip leg has a plurality of openings. 
 
     
     
       9. The foam core as claimed in  claim 1 , wherein a lower core base part has a higher degree of hardness than an upper core base part. 
     
     
       10. The foam core as claimed in  claim 1 , wherein the spring strips are located in a central region of the core base. 
     
     
       11. The foam core as claimed in  claim 1 , wherein the core base has at least one further layer of a cushion material above the core base having a lower degree of hardness than the core base.